“Collagen Membrane And Leukocyte Platelet Rich Fibrin For Periodontal Regeneration In An In-Frabony Defect: A Case Report”. Journal of Pharmaceutical Negative Results (January 1, 2023): 376–383. Accessed June 9, 2026. https://mail.pnrjournal.com/index.php/home/article/view/7188.